Materials Literature
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Article Constitution and Thermodynamics of Fe - Nd Alloys / Konstitution und Thermodynamik von Fe — Nd-Legierungen was published on October 1, 1993 in the journal International Journal of Materials Research (volume 84, issue 10).
Abstract Studies were carried out to develop a mathematical model based on experimental results to correlate agitation and other polymerization parameters with the particle size of PVC and to specify the limits of agitation speed within the defined agitation system. Computer regression analysis of about 30 vinyl chlor…
Abstract An analysis is presented of the process of die drawing isotropic polymers, in the form of circular rods, to produce highly oriented materials with enhanced mechanical properties. The stresses in a small element of material undergoing the drawing process have been analyzed using a force‐equilibrium approach an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFormation of excited hydroxyl radicals in high-energy-electron-irradiated ice at very low temperatureTetsuo Miyazaki, Shigeru Nagasaka, Yasunobu Kamiya, and Katsumi TanimuraCite this: J. Phys. Chem. 1993, 97, 41, 10715–10719Publication Date (Print):October 1, 1993Publication…
Abstract The linear expansion and contraction in the principal planar directions of poly[1‐(trimethylsilyl)‐1‐propyne] film were measured concurrently with the sorption of n ‐nonane at 35°C. After the first sorption cycle, in which the polymer exhibited markedly nonisotropic volumetric dilation, the polymer expanded a…
Fangite is decribed on the basis of one specimen found in a sulfide ore stockpile at the mine. It occurs in a vug with pyrite and other sulfide material of complex composition. A single-crystal x-ray diffraction study shows fangite to be orthorhombic, space group Pnma, with unit-cell parameters a=8.894, b=10.855, c=9.…
Abstract α,ω‐Divinyl‐terminated polydimethylsiloxane polymers with low polydispersivity were synthesized via anionic polymerization of hexamethylcyclotrisiloxane (D 3 ). Five “monodisperse” polymers with different molecular weights were hydrosilylated with tetrakisdimethylsiloxysilane in the presence of platinum catal…
The electronic structure of the fcc Fe~Pd alloy system is investigated by band structure calculations employing the augmented spherical wave (ASW) method. The three compositions Fe3Pd, FePd and FePd3 are studied assuming the ordered CU3Au and the CuAu structure respectively. The total energy is computed as a function…
Cyclic fatigue crack growth behavior has been investigated in 9 mol% Ce‐TZP ceramics with grain sizes varying from 1.1 to 3.0 μm. To ascertain the interaction between crack resistance curve behavior and cyclic fatigue crack growth, cyclic fatigue tests were conducted with short double‐cantilever‐beam specimens in two…
In a work studying the corrosion and tarnishing properties of a variety of copper alloys, the alloy Cu‐Al10‐Sn5 was found to show an excellent corrosion resistance in neutral solutions, where copper and most conventional Cu alloys are covered by thick nonprotective surface layers. The passive films formed on this allo…
We study the configurations of a nematic liquid crystal confined between two concentric cylinders, of radii ${\mathit{r}}_{1}$ and \ensuremath{\rho}${\mathit{r}}_{1}$>${\mathit{r}}_{1}$, with homeotropic anchoring conditions at the walls. For \ensuremath{\rho}${\mathrm{\ensuremath{\rho}}}_{\mathit{c}}$=exp[\ensurem…
A novel resistometric technique enables the investigation of single void nucleation and growth induced by electromigration (EM) for aluminum (Al) lines having a perfect bamboo structure in comparison with single-crystal Al lines. Fine tungsten (W) voltage probes were fabricated at every 4 μm along the Al line with gra…
Following polarization reversal, the strength of photovoltaic currents from lead-based perovskite film capacitors shows a dependence on time. An initial photovoltaic current decays rapidly to an almost steady-state current, which then decays slowly. We use a nonswitching surface layer model to explain remanent-polariz…
Abstract Examples of specific intermolecular interaction (dipole, EDA, steric interactions as well as hydrogen bonds) are discussed in binary mixtures of calamitic, columnar and polymeric systems. It is shown, that on the base of the complete miscibility in the liquid crystalline state a continuous change of the inter…
Abstract Glasses containing very small particles of CdS are prepared and their properties studied. Changes in the optical absorption spectra of CdS glass result from quantum confinement effects. With very small particle size, large confinement energies of up to 4 eV are obtained, which have not been before. The blue‐s…
We discuss here the physical bases of discrete models for the spin crossover systems, and we consider specifically the case of two sublattices which reproduces the so-called two-step transitions.
Abstract Principal component analysis (PCA) and target testing (TT) were performed on a series of reduced 2.5 wt.% Cr/Al 2 O 3 catalysts to determine the number, positions, shapes and relative spectral compositions (i.e. Cr oxidation states) in Cr 2p spectra as monitored by ESCA. The results from PCA indicated the pre…
Abstract Infrared spectroscopic studies of the effects of field strength upon the ferroelectric phase transition behavior of a VDF/TrFE (75/25) copolymer upon heating and cooling in an electric field have revealed new findings. The paraelectric phase in the absence of an electric field resembles the α phase of PVDF wi…
Trends in electron impact broadening and shift within spectral series are assessed using various theoretical calculations for Li I, Na I, C IV, and Si IV. Facile predictions, based on use of upper state ionization potential as the appropriate variable for representing atomic structure (Purić et al. 1991), are used to…
Owing to the two-dimensional periodicity of a superstructure on the crystal surface, the intensity in reciprocal space is continuously distributed along rods normal to the sample surface. The analysis of rod scans in surface X-ray diffraction provides information about the structure parameters normal to the sample sur…